supply of led tube light 18w to 20w, self- ballasted retrofit led tube light 18w to 20 watts with lumen output of more than 100 lumens per watt, shall be 1200mm length with g 13 bi-pin type base for retrofitting with existing conventional type t8 / t12 flt fixture suitable to work in 150-270 volt 50 hz supply with following parameters wattage: 18w to 20w, power factor> 0.9, view angle: minimum 120 deg, colour temperature: 5500-6500k cri:>80, driver- inbuilt, surge protection upto 2.5 kv, thd: 90%, ingress protection : ip20. driver efficiency :85% . materials shall be as per is16106-2012 &ies lm79 &lm 80 . material should have mandatory safety certificate of bis. warranty: 5 years. make: philips, bajaj, osram, wipro, ge, havells, crompton, surya, eveready, hpl, aristo, ki kumar , syska and moserbear . [ warranty period: 60 months after the date of delivery ]